The philosopher Soren Kierkegaard argued in his 1844 work ‘The Concept of Anxiety’ that anxiety is a vital aspect of the human condition, a consequence of freedom and choice. In this article I argue that this, along with other key concepts of anxiety identified by Kierkegaard including the avoidance of past negative experiences, and education in choice outcomes, are supported by modern theories of anxiety using evidence from social and experimental psychology as well as psychiatry. A proposed future body of (...) work involving anxiety and free will stemming from Kierkegaard’s philosophy is also discussed. (shrink)